/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright (c) 2008-2009, The KiWi Project (http://www.kiwi-project.eu)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * - Neither the name of the KiWi Project nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Contributor(s):
 * sschaffe
 * 
 */
package kiwi.core.webservices;

import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.ws.rs.core.Application;
import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;

/**
 * CoreApplication
 *
 * TODO: manage this by reading kiwi-module.properties file in each of the KiWi modules and looking for a property
 * "webservices"
 *
 * @author Sebastian Schaffert
 *
 */
public class CoreApplication extends Application {

    private Logger log = LoggerFactory.getLogger(CoreApplication.class);


    private static Set<Class<?>> classes = null;

	/**
	 * 
	 */
	public CoreApplication() {
		super();
	}

	/* (non-Javadoc)
	 * @see javax.ws.rs.core.Application#getClasses()
	 */
	@Override
	public Set<Class<?>> getClasses() {


        if(classes == null) {
            classes = new HashSet<Class<?>>();

            try {
                Enumeration<URL> modulePropertiesEnum = this.getClass().getClassLoader().getResources("kiwi-module.properties");

                while(modulePropertiesEnum.hasMoreElements()) {
                    URL moduleUrl = modulePropertiesEnum.nextElement();

                    Configuration moduleProperties = null;
                    try {
                        moduleProperties = new PropertiesConfiguration(moduleUrl);

                        for(Object clsName : moduleProperties.getList("webservices")) {

                            if(!"".equals(clsName)) {
                                try {
                                    Class cls = Class.forName(clsName.toString());

                                    classes.add(cls);

                                    log.debug("module {}: registered webservice {}", moduleProperties.getString("name"), cls.getCanonicalName());
                                } catch (ClassNotFoundException e) {
                                    log.error("could not load class {}, it was not found",clsName.toString());
                                }
                            }
                        }

                    } catch (ConfigurationException e) {
                        log.error("configuration exception: {}",e.getMessage());
                    }

                }


            } catch (IOException e) {
                log.error("I/O error while trying to load kiwi-module.properties file: {}",e.getMessage());
            }
        }

		return classes;
	}

	
	
}
